docs: Add a copy of the buildpacks node tutorial without a skaffold.yaml

[maggieneterval]

Description

Creates a copy of the buildpacks node tutorial without a skaffold.yaml, so that it can be used in a tutorial that has users run skaffold init to generate the skaffold.yaml.

@aaron-prindle LMK what you think!

[codecov]

Codecov Report

Merging #7968 (4809df9) into main (290280e) will decrease coverage by 3.84%.
The diff coverage is 54.09%.

@@            Coverage Diff             @@
##             main    #7968      +/-   ##
==========================================
- Coverage   70.48%   66.63%   -3.85%     
==========================================
  Files         515      596      +81     
  Lines       23150    28889    +5739     
==========================================
+ Hits        16317    19251    +2934     
- Misses       5776     8207    +2431     
- Partials     1057     1431     +374     

Impacted Files	Coverage Δ
cmd/skaffold/app/cmd/credits/export.go	0.00% <0.00%> (ø)
cmd/skaffold/app/cmd/deploy.go	40.90% <0.00%> (-12.94%)	⬇️
cmd/skaffold/app/cmd/test.go	44.44% <0.00%> (ø)
cmd/skaffold/app/exitcode.go	100.00% <ø> (+6.66%)	⬆️
cmd/skaffold/skaffold.go	0.00% <0.00%> (ø)
cmd/skaffold/app/cmd/inspect_tests.go	62.50% <14.28%> (-1.14%)	⬇️
cmd/skaffold/app/cmd/render.go	35.48% <18.18%> (-5.90%)	⬇️
cmd/skaffold/app/cmd/lsp.go	28.12% <28.12%> (ø)
cmd/skaffold/app/cmd/run.go	64.28% <33.33%> (-9.63%)	⬇️
cmd/skaffold/app/cmd/fix.go	56.41% <37.50%> (-20.07%)	⬇️
... and 388 more

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[aaron-prindle]

LGTM! I think if you can rebase and resubmit this, we can get all the tests passing and then merge

[aaron-prindle]

I think there is one small error from our CI/CD:

Every code sample that is in ./examples should also be in ./integration/examples
The following are in examples but not in integration/examples:
buildpacks-node-tutorial
FAILED hack/check-samples.sh

Can you copy this sample to integration/examples?